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SignalHarness EVM Block Analyzer
x402
SignalHarness EVM Block Analyzer is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Analyzes a supplied EVM block (or block-related data) and returns a structured analysis with warnings and evidence scope
Price / call$0.01
Success—
StatusUnknown
How this service works
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Output
Returns a JSON object with a block_analysis narrative, a list of warnings (strings), an evidence_scope field indicating the data provenance (e.g. 'caller_supplied_data'), a status field ('succeeded'), and a signed receipt containing payment details, latency, a SHA-256 result hash, and execution metadata.
Example use cases
Detect suspicious block activity
“I've got an EVM block that I think might contain a sandwich attack — can you run it through the block analyzer and tell me what warnings or red flags show up?”
Audit a Base chain block
“Can you analyze block 19500000 data from the Base network and give me a full breakdown of what transactions and activity it contains, plus any anomalies?”
Validate block data before processing
“Before my pipeline processes this EVM block payload, can you run an analysis on it and tell me if there are any warnings or evidence-scope issues I should know about?”
Technical details
Endpoint
POSThttps://signalharness.ai/api/agent/services/evm_block_analyze/invokeWhen to prefer
Choose this endpoint when you need AI-powered semantic analysis of EVM block data — particularly for detecting anomalies, extracting structured insights, or auditing on-chain activity at the block level. Prefer it over raw RPC calls when you want interpreted results with warnings rather than raw block JSON. Suitable for agents that need to reason about block contents without implementing their own parsing logic.
Side effects
- Invalid or malformed evm_block_request string returns an error
- Block data exceeding 65536 characters will be rejected
- Payment failure or insufficient USDC balance prevents execution
- Ambiguous or incomplete block data may result in low-confidence analysis with broad warnings
- Network issues may cause timeout with no result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| evm_block_request | string |
Output
Schema · Response
{
"type": "json",
"example": {
"replay": false,
"result": {
"warnings": [
"The supplied block is not independently validated or fetched."
],
"service_id": "evm_block_analyze",
"block_analysis": "{\"gas_limit\":\"30000000\",\"gas_used\":\"21000\",\"gas_utilization\":\"0.07\",\"hash\":\"0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\",\"number\":\"100\",\"parent_hash\":\"0xcccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc\",\"total_value_atomic\":\"10\",\"transaction_count\":1}",
"evidence_scope": "caller_supplied_data"
},
"status": "succeeded",
"receipt": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"usage": [],
"status": "succeeded",
"network": "eip155:8453",
"artifacts": [],
"endedAtMs": 0,
"latencyMs": 0,
"paymentId": "example-payment",
"receiptId": "example-receipt",
"requestId": "example-request",
"serviceId": "evm_block_analyze",
"executionId": "example-execution",
"startedAtMs": 0,
"amountAtomic": "10000",
"resultSha256": "cfe50c9e1bd0310bcdd46b8cd335a0bf2f47466df90ab16977751bca1f7bc887",
"serviceVersion": "1.0.0",
"settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
},
"artifacts": [],
"requestId": "example-request",
"executionId": "example-execution"
}
}Tags
x402
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